0 | Two Sum | C++ Python | Note | Easy | Mapping |
1 | Add Two Numbers | C++ Python | Note | Medium | LinkedList |
2 | Longest Substring Without Repeating Characters | C++ Python | Note | Medium | Mapping |
3 | Median of Two Sorted Arrays | C++ Python | Note | Hard | |
4 | Longest Palindromic Substring | C++ Python | Note | Medium | |
5 | ZigZag Conversion | C++ Python | Note | Medium | |
6 | Reverse Integer | C++ Python | Note | Easy | |
7 | String to Integer (atoi) | C++ Python | Note | Medium | |
8 | Palindrome Number | C++ Python | Note | Easy | |
9 | Regular Expression Matching | C++ Python | Note | Hard | |
10 | Container With Most Water | C++ Python | Note | Medium | |
11 | Integer to Roman | C++ Python | Note | Medium | |
12 | Roman to Integer | C++ Python | Note | Easy | |
13 | Longest Common Prefix | C++ Python | Note | Easy | |
14 | 3Sum | C++ Python | Note | Medium | |
15 | 3Sum Closest | C++ Python | Note | Medium | |
16 | Letter Combinations of a Phone Number | C++ Python | Note | Medium | |
17 | 4Sum | C++ Python | Note | Medium | |
18 | Remove Nth Node From End of List | C++ Python | Note | Medium | |
19 | Valid Parentheses | C++ Python | Note | Easy | |
20 | Merge Two Sorted Lists | C++ Python | Note | Easy | |
21 | Generate Parentheses | C++ Python | Note | Medium | |
22 | Merge k Sorted Lists | C++ Python | Note | Hard | |
23 | Swap Nodes in Pairs | C++ Python | Note | Medium | |
24 | Reverse Nodes in k-Group | C++ Python | Note | Hard | |
25 | Remove Duplicates from Sorted Array | C++ Python | Note | Easy | |
26 | Remove Element | C++ Python | Note | Easy | |
27 | Implement strStr() | C++ Python | Note | Easy | |
28 | Divide Two Integers | C++ Python | Note | Medium | |
29 | Substring with Concatenation of All Words | C++ Python | Note | Hard | |
30 | Next Permutation | C++ Python | Note | Medium | |
31 | Longest Valid Parentheses | C++ Python | Note | Hard | |
32 | Search in Rotated Sorted Array | C++ Python | Note | Medium | |
33 | Search for a Range | C++ Python | Note | Medium | |
34 | Search Insert Position | C++ Python | Note | Easy | |
35 | Valid Sudoku | C++ Python | Note | Medium | |
36 | Sudoku Solver | C++ Python | Note | Hard | |
37 | Count and Say | C++ Python | Note | Easy | |
38 | Combination Sum | C++ Python | Note | Medium | |
39 | Combination Sum II | C++ Python | Note | Medium | |
40 | First Missing Positive | C++ Python | Note | Hard | |
41 | Trapping Rain Water | C++ Python | Note | Hard | |
42 | Multiply Strings | C++ Python | Note | Medium | |
43 | Wildcard Matching | C++ Python | Note | Hard | |
44 | Jump Game II | C++ Python | Note | Hard | |
45 | Permutations | C++ Python | Note | Medium | |
46 | Permutations II | C++ Python | Note | Medium | |
47 | Rotate Image | C++ Python | Note | Medium | |
48 | Group Anagrams | C++ Python | Note | Medium | |
49 | Pow(x, n) | C++ Python | Note | Medium | |
50 | N-Queens | C++ Python | Note | Hard | |
51 | N-Queens II | C++ Python | Note | Hard | |
52 | Maximum Subarray | C++ Python | Note | Easy | |
53 | Spiral Matrix | C++ Python | Note | Medium | |
54 | Jump Game | C++ Python | Note | Medium | |
55 | Merge Intervals | C++ Python | Note | Medium | |
56 | Insert Interval | C++ Python | Note | Hard | |
57 | Length of Last Word | C++ Python | Note | Easy | |
58 | Spiral Matrix II | C++ Python | Note | Medium | |
59 | Permutation Sequence | C++ Python | Note | Medium | |
60 | Rotate List | C++ Python | Note | Medium | |
61 | Unique Paths | C++ Python | Note | Medium | |
62 | Unique Paths II | C++ Python | Note | Medium | |
63 | Minimum Path Sum | C++ Python | Note | Medium | |
64 | Valid Number | C++ Python | Note | Hard | |
65 | Plus One | C++ Python | Note | Easy | |
66 | Add Binary | C++ Python | Note | Easy | |
67 | Text Justification | C++ Python | Note | Hard | |
68 | Sqrt(x) | C++ Python | Note | Easy | |
69 | Climbing Stairs | C++ Python | Note | Easy | |
70 | Simplify Path | C++ Python | Note | Medium | |
71 | Edit Distance | C++ Python | Note | Hard | |
72 | Set Matrix Zeroes | C++ Python | Note | Medium | |
73 | Search a 2D Matrix | C++ Python | Note | Medium | |
74 | Sort Colors | C++ Python | Note | Medium | |
75 | Minimum Window Substring | C++ Python | Note | Hard | |
76 | Combinations | C++ Python | Note | Medium | |
77 | Subsets | C++ Python | Note | Medium | |
78 | Word Search | C++ Python | Note | Medium | |
79 | Remove Duplicates from Sorted Array II | C++ Python | Note | Medium | |
80 | Search in Rotated Sorted Array II | C++ Python | Note | Medium | |
81 | Remove Duplicates from Sorted List II | C++ Python | Note | Medium | |
82 | Remove Duplicates from Sorted List | C++ Python | Note | Easy | |
83 | Largest Rectangle in Histogram | C++ Python | Note | Hard | |
84 | Maximal Rectangle | C++ Python | Note | Hard | |
85 | Partition List | C++ Python | Note | Medium | |
86 | Scramble String | C++ Python | Note | Hard | |
87 | Merge Sorted Array | C++ Python | Note | Easy | |
88 | Gray Code | C++ Python | Note | Medium | |
89 | Subsets II | C++ Python | Note | Medium | |
90 | Decode Ways | C++ Python | Note | Medium | |
91 | Reverse Linked List II | C++ Python | Note | Medium | |
92 | Restore IP Addresses | C++ Python | Note | Medium | |
93 | Binary Tree Inorder Traversal | C++ Python | Note | Medium | |
94 | Unique Binary Search Trees II | C++ Python | Note | Medium | |
95 | Unique Binary Search Trees | C++ Python | Note | Medium | |
96 | Interleaving String | C++ Python | Note | Hard | |
97 | Validate Binary Search Tree | C++ Python | Note | Medium | |
98 | Recover Binary Search Tree | C++ Python | Note | Hard | |
99 | Same Tree | C++ Python | Note | Easy | |
100 | Symmetric Tree | C++ Python | Note | Easy | |
101 | Binary Tree Level Order Traversal | C++ Python | Note | Medium | |
102 | Binary Tree Zigzag Level Order Traversal | C++ Python | Note | Medium | |
103 | Maximum Depth of Binary Tree | C++ Python | Note | Easy | |
104 | Construct Binary Tree from Preorder and Inorder Traversal | C++ Python | Note | Medium | |
105 | Construct Binary Tree from Inorder and Postorder Traversal | C++ Python | Note | Medium | |
106 | Binary Tree Level Order Traversal II | C++ Python | Note | Easy | |
107 | Convert Sorted Array to Binary Search Tree | C++ Python | Note | Easy | |
108 | Convert Sorted List to Binary Search Tree | C++ Python | Note | Medium | |
109 | Balanced Binary Tree | C++ Python | Note | Easy | |
110 | Minimum Depth of Binary Tree | C++ Python | Note | Easy | |
111 | Path Sum | C++ Python | Note | Easy | |
112 | Path Sum II | C++ Python | Note | Medium | |
113 | Flatten Binary Tree to Linked List | C++ Python | Note | Medium | |
114 | Distinct Subsequences | C++ Python | Note | Hard | |
115 | Populating Next Right Pointers in Each Node | C++ Python | Note | Medium | |
116 | Populating Next Right Pointers in Each Node II | C++ Python | Note | Medium | |
117 | Pascal's Triangle | C++ Python | Note | Easy | |
118 | Pascal's Triangle II | C++ Python | Note | Easy | |
119 | Triangle | C++ Python | Note | Medium | |
120 | Best Time to Buy and Sell Stock | C++ Python | Note | Easy | |
121 | Best Time to Buy and Sell Stock II | C++ Python | Note | Easy | |
122 | Best Time to Buy and Sell Stock III | C++ Python | Note | Hard | |
123 | Binary Tree Maximum Path Sum | C++ Python | Note | Hard | |
124 | Valid Palindrome | C++ Python | Note | Easy | |
125 | Word Ladder II | C++ Python | Note | Hard | |
126 | Word Ladder | C++ Python | Note | Medium | |
127 | Longest Consecutive Sequence | C++ Python | Note | Hard | |
128 | Sum Root to Leaf Numbers | C++ Python | Note | Medium | |
129 | Surrounded Regions | C++ Python | Note | Medium | |
130 | Palindrome Partitioning | C++ Python | Note | Medium | |
131 | Palindrome Partitioning II | C++ Python | Note | Hard | |
132 | Clone Graph | C++ Python | Note | Medium | |
133 | Gas Station | C++ Python | Note | Medium | |
134 | Candy | C++ Python | Note | Hard | |
135 | Single Number | C++ Python | Note | Easy | |
136 | Single Number II | C++ Python | Note | Medium | |
137 | Copy List with Random Pointer | C++ Python | Note | Medium | |
138 | Word Break | C++ Python | Note | Medium | |
139 | Word Break II | C++ Python | Note | Hard | |
140 | Linked List Cycle | C++ Python | Note | Easy | |
141 | Linked List Cycle II | C++ Python | Note | Medium | |
142 | Reorder List | C++ Python | Note | Medium | |
143 | Binary Tree Preorder Traversal | C++ Python | Note | Medium | |
144 | Binary Tree Postorder Traversal | C++ Python | Note | Hard | |
145 | LRU Cache | C++ Python | Note | Hard | |
146 | Insertion Sort List | C++ Python | Note | Medium | |
147 | Sort List | C++ Python | Note | Medium | |
148 | Max Points on a Line | C++ Python | Note | Hard | |
149 | Evaluate Reverse Polish Notation | C++ Python | Note | Medium | |
150 | Reverse Words in a String | C++ Python | Note | Medium | |
151 | Maximum Product Subarray | C++ Python | Note | Medium | |
152 | Find Minimum in Rotated Sorted Array | C++ Python | Note | Medium | |
153 | Find Minimum in Rotated Sorted Array II | C++ Python | Note | Hard | |
154 | Min Stack | C++ Python | Note | Easy | |
155 | Binary Tree Upside Down | C++ Python | Note | None | |
156 | Read N Characters Given Read4 | C++ Python | Note | None | |
157 | Read N Characters Given Read4 II - Call multiple times | C++ Python | Note | None | |
158 | Longest Substring with At Most Two Distinct Characters | C++ Python | Note | None | |
159 | Intersection of Two Linked Lists | C++ Python | Note | Easy | |
160 | One Edit Distance | C++ Python | Note | None | |
161 | Find Peak Element | C++ Python | Note | Medium | |
162 | Missing Ranges | C++ Python | Note | None | |
163 | Maximum Gap | C++ Python | Note | Hard | |
164 | Compare Version Numbers | C++ Python | Note | Medium | |
165 | Fraction to Recurring Decimal | C++ Python | Note | Medium | |
166 | Two Sum II - Input array is sorted | C++ Python | Note | Easy | |
167 | Excel Sheet Column Title | C++ Python | Note | Easy | |
168 | Majority Element | C++ Python | Note | Easy | |
169 | Two Sum III - Data structure design | C++ Python | Note | None | |
170 | Excel Sheet Column Number | C++ Python | Note | Easy | |
171 | Factorial Trailing Zeroes | C++ Python | Note | Easy | |
172 | Binary Search Tree Iterator | C++ Python | Note | Medium | |
173 | Dungeon Game | C++ Python | Note | Hard | |
174 | Combine Two Tables | C++ Python | Note | Easy | |
175 | Second Highest Salary | C++ Python | Note | Easy | |
176 | Nth Highest Salary | C++ Python | Note | Medium | |
177 | Rank Scores | C++ Python | Note | Medium | |
178 | Largest Number | C++ Python | Note | Medium | |
179 | Consecutive Numbers | C++ Python | Note | Medium | |
180 | Employees Earning More Than Their Managers | C++ Python | Note | Easy | |
181 | Duplicate Emails | C++ Python | Note | Easy | |
182 | Customers Who Never Order | C++ Python | Note | Easy | |
183 | Department Highest Salary | C++ Python | Note | Medium | |
184 | Department Top Three Salaries | C++ Python | Note | Hard | |
185 | Reverse Words in a String II | C++ Python | Note | None | |
186 | Repeated DNA Sequences | C++ Python | Note | Medium | |
187 | Best Time to Buy and Sell Stock IV | C++ Python | Note | Hard | |
188 | Rotate Array | C++ Python | Note | Easy | |
189 | Reverse Bits | C++ Python | Note | Easy | |
190 | Number of 1 Bits | C++ Python | Note | Easy | |
191 | Word Frequency | C++ Python | Note | Medium | |
192 | Valid Phone Numbers | C++ Python | Note | Easy | |
193 | Transpose File | C++ Python | Note | Medium | |
194 | Tenth Line | C++ Python | Note | Easy | |
195 | Delete Duplicate Emails | C++ Python | Note | Easy | |
196 | Rising Temperature | C++ Python | Note | Easy | |
197 | House Robber | C++ Python | Note | Easy | |
198 | Binary Tree Right Side View | C++ Python | Note | Medium | |
199 | Number of Islands | C++ Python | Note | Medium | |
200 | Bitwise AND of Numbers Range | C++ Python | Note | Medium | |
201 | Happy Number | C++ Python | Note | Easy | |
202 | Remove Linked List Elements | C++ Python | Note | Easy | |
203 | Count Primes | C++ Python | Note | Easy | |
204 | Isomorphic Strings | C++ Python | Note | Easy | |
205 | Reverse Linked List | C++ Python | Note | Easy | |
206 | Course Schedule | C++ Python | Note | Medium | |
207 | Implement Trie (Prefix Tree) | C++ Python | Note | Medium | |
208 | Minimum Size Subarray Sum | C++ Python | Note | Medium | |
209 | Course Schedule II | C++ Python | Note | Medium | |
210 | Add and Search Word - Data structure design | C++ Python | Note | Medium | |
211 | Word Search II | C++ Python | Note | Hard | |
212 | House Robber II | C++ Python | Note | Medium | |
213 | Shortest Palindrome | C++ Python | Note | Hard | |
214 | Kth Largest Element in an Array | C++ Python | Note | Medium | |
215 | Combination Sum III | C++ Python | Note | Medium | |
216 | Contains Duplicate | C++ Python | Note | Easy | |
217 | The Skyline Problem | C++ Python | Note | Hard | |
218 | Contains Duplicate II | C++ Python | Note | Easy | |
219 | Contains Duplicate III | C++ Python | Note | Medium | |
220 | Maximal Square | C++ Python | Note | Medium | |
221 | Count Complete Tree Nodes | C++ Python | Note | Medium | |
222 | Rectangle Area | C++ Python | Note | Medium | |
223 | Basic Calculator | C++ Python | Note | Hard | |
224 | Implement Stack using Queues | C++ Python | Note | Easy | |
225 | Invert Binary Tree | C++ Python | Note | Easy | |
226 | Basic Calculator II | C++ Python | Note | Medium | |
227 | Summary Ranges | C++ Python | Note | Medium | |
228 | Majority Element II | C++ Python | Note | Medium | |
229 | Kth Smallest Element in a BST | C++ Python | Note | Medium | |
230 | Power of Two | C++ Python | Note | Easy | |
231 | Implement Queue using Stacks | C++ Python | Note | Easy | |
232 | Number of Digit One | C++ Python | Note | Hard | |
233 | Palindrome Linked List | C++ Python | Note | Easy | |
234 | Lowest Common Ancestor of a Binary Search Tree | C++ Python | Note | Easy | |
235 | Lowest Common Ancestor of a Binary Tree | C++ Python | Note | Medium | |
236 | Delete Node in a Linked List | C++ Python | Note | Easy | |
237 | Product of Array Except Self | C++ Python | Note | Medium | |
238 | Sliding Window Maximum | C++ Python | Note | Hard | |
239 | Search a 2D Matrix II | C++ Python | Note | Medium | |
240 | Different Ways to Add Parentheses | C++ Python | Note | Medium | |
241 | Valid Anagram | C++ Python | Note | Easy | |
242 | Shortest Word Distance | C++ Python | Note | None | |
243 | Shortest Word Distance II | C++ Python | Note | None | |
244 | Shortest Word Distance III | C++ Python | Note | None | |
245 | Strobogrammatic Number | C++ Python | Note | None | |
246 | Strobogrammatic Number II | C++ Python | Note | None | |
247 | Strobogrammatic Number III | C++ Python | Note | None | |
248 | Group Shifted Strings | C++ Python | Note | None | |
249 | Count Univalue Subtrees | C++ Python | Note | None | |
250 | Flatten 2D Vector | C++ Python | Note | None | |
251 | Meeting Rooms | C++ Python | Note | None | |
252 | Meeting Rooms II | C++ Python | Note | None | |
253 | Factor Combinations | C++ Python | Note | None | |
254 | Verify Preorder Sequence in Binary Search Tree | C++ Python | Note | None | |
255 | Paint House | C++ Python | Note | None | |
256 | Binary Tree Paths | C++ Python | Note | Easy | |
257 | Add Digits | C++ Python | Note | Easy | |
258 | 3Sum Smaller | C++ Python | Note | None | |
259 | Single Number III | C++ Python | Note | Medium | |
260 | Graph Valid Tree | C++ Python | Note | None | |
261 | Trips and Users | C++ Python | Note | Hard | |
262 | Ugly Number | C++ Python | Note | Easy | |
263 | Ugly Number II | C++ Python | Note | Medium | |
264 | Paint House II | C++ Python | Note | None | |
265 | Palindrome Permutation | C++ Python | Note | None | |
266 | Palindrome Permutation II | C++ Python | Note | None | |
267 | Missing Number | C++ Python | Note | Easy | |
268 | Alien Dictionary | C++ Python | Note | None | |
269 | Closest Binary Search Tree Value | C++ Python | Note | None | |
270 | Encode and Decode Strings | C++ Python | Note | None | |
271 | Closest Binary Search Tree Value II | C++ Python | Note | None | |
272 | Integer to English Words | C++ Python | Note | Hard | |
273 | H-Index | C++ Python | Note | Medium | |
274 | H-Index II | C++ Python | Note | Medium | |
275 | Paint Fence | C++ Python | Note | None | |
276 | Find the Celebrity | C++ Python | Note | None | |
277 | First Bad Version | C++ Python | Note | Easy | |
278 | Perfect Squares | C++ Python | Note | Medium | |
279 | Wiggle Sort | C++ Python | Note | None | |
280 | Zigzag Iterator | C++ Python | Note | None | |
281 | Expression Add Operators | C++ Python | Note | Hard | |
282 | Move Zeroes | C++ Python | Note | Easy | |
283 | Peeking Iterator | C++ Python | Note | Medium | |
284 | Inorder Successor in BST | C++ Python | Note | None | |
285 | Walls and Gates | C++ Python | Note | None | |
286 | Find the Duplicate Number | C++ Python | Note | Medium | |
287 | Unique Word Abbreviation | C++ Python | Note | None | |
288 | Game of Life | C++ Python | Note | Medium | |
289 | Word Pattern | C++ Python | Note | Easy | |
290 | Word Pattern II | C++ Python | Note | None | |
291 | Nim Game | C++ Python | Note | Easy | |
292 | Flip Game | C++ Python | Note | None | |
293 | Flip Game II | C++ Python | Note | None | |
294 | Find Median from Data Stream | C++ Python | Note | Hard | |
295 | Best Meeting Point | C++ Python | Note | None | |
296 | Serialize and Deserialize Binary Tree | C++ Python | Note | Hard | |
297 | Binary Tree Longest Consecutive Sequence | C++ Python | Note | None | |
298 | Bulls and Cows | C++ Python | Note | Medium | |
299 | Longest Increasing Subsequence | C++ Python | Note | Medium | |
300 | Remove Invalid Parentheses | C++ Python | Note | Hard | |
301 | Smallest Rectangle Enclosing Black Pixels | C++ Python | Note | None | |
302 | Range Sum Query - Immutable | C++ Python | Note | Easy | |
303 | Range Sum Query 2D - Immutable | C++ Python | Note | Medium | |
304 | Number of Islands II | C++ Python | Note | None | |
305 | Additive Number | C++ Python | Note | Medium | |
306 | Range Sum Query - Mutable | C++ Python | Note | Medium | |
307 | Range Sum Query 2D - Mutable | C++ Python | Note | None | |
308 | Best Time to Buy and Sell Stock with Cooldown | C++ Python | Note | Medium | |
309 | Minimum Height Trees | C++ Python | Note | Medium | |
310 | Sparse Matrix Multiplication | C++ Python | Note | None | |
311 | Burst Balloons | C++ Python | Note | Hard | |
312 | Super Ugly Number | C++ Python | Note | Medium | |
313 | Binary Tree Vertical Order Traversal | C++ Python | Note | None | |
314 | Count of Smaller Numbers After Self | C++ Python | Note | Hard | |
315 | Remove Duplicate Letters | C++ Python | Note | Hard | |
316 | Shortest Distance from All Buildings | C++ Python | Note | None | |
317 | Maximum Product of Word Lengths | C++ Python | Note | Medium | |
318 | Bulb Switcher | C++ Python | Note | Medium | |
319 | Generalized Abbreviation | C++ Python | Note | None | |
320 | Create Maximum Number | C++ Python | Note | Hard | |
321 | Coin Change | C++ Python | Note | Medium | |
322 | Number of Connected Components in an Undirected Graph | C++ Python | Note | None | |
323 | Wiggle Sort II | C++ Python | Note | Medium | |
324 | Maximum Size Subarray Sum Equals k | C++ Python | Note | None | |
325 | Power of Three | C++ Python | Note | Easy | |
326 | Count of Range Sum | C++ Python | Note | Hard | |
327 | Odd Even Linked List | C++ Python | Note | Medium | |
328 | Longest Increasing Path in a Matrix | C++ Python | Note | Hard | |
329 | Patching Array | C++ Python | Note | Hard | |
330 | Verify Preorder Serialization of a Binary Tree | C++ Python | Note | Medium | |
331 | Reconstruct Itinerary | C++ Python | Note | Medium | |
332 | Largest BST Subtree | C++ Python | Note | None | |
333 | Increasing Triplet Subsequence | C++ Python | Note | Medium | |
334 | Self Crossing | C++ Python | Note | Hard | |
335 | Palindrome Pairs | C++ Python | Note | Hard | |
336 | House Robber III | C++ Python | Note | Medium | |
337 | Counting Bits | C++ Python | Note | Medium | |
338 | Nested List Weight Sum | C++ Python | Note | None | |
339 | Longest Substring with At Most K Distinct Characters | C++ Python | Note | None | |
340 | Flatten Nested List Iterator | C++ Python | Note | Medium | |
341 | Power of Four | C++ Python | Note | Easy | |
342 | Integer Break | C++ Python | Note | Medium | |
343 | Reverse String | C++ Python | Note | Easy | |
344 | Reverse Vowels of a String | C++ Python | Note | Easy | |
345 | Moving Average from Data Stream | C++ Python | Note | None | |
346 | Top K Frequent Elements | C++ Python | Note | Medium | |
347 | Design Tic-Tac-Toe | C++ Python | Note | None | |
348 | Intersection of Two Arrays | C++ Python | Note | Easy | |
349 | Intersection of Two Arrays II | C++ Python | Note | Easy | |
350 | Android Unlock Patterns | C++ Python | Note | None | |
351 | Data Stream as Disjoint Intervals | C++ Python | Note | Hard | |
352 | Design Snake Game | C++ Python | Note | None | |
353 | Russian Doll Envelopes | C++ Python | Note | Hard | |
354 | Design Twitter | C++ Python | Note | Medium | |
355 | Line Reflection | C++ Python | Note | None | |
356 | Count Numbers with Unique Digits | C++ Python | Note | Medium | |
357 | Rearrange String k Distance Apart | C++ Python | Note | None | |
358 | Logger Rate Limiter | C++ Python | Note | None | |
359 | Sort Transformed Array | C++ Python | Note | None | |
360 | Bomb Enemy | C++ Python | Note | None | |
361 | Design Hit Counter | C++ Python | Note | None | |
362 | Max Sum of Rectangle No Larger Than K | C++ Python | Note | Hard | |
363 | Nested List Weight Sum II | C++ Python | Note | None | |
364 | Water and Jug Problem | C++ Python | Note | Medium | |
365 | Find Leaves of Binary Tree | C++ Python | Note | None | |
366 | Valid Perfect Square | C++ Python | Note | Easy | |
367 | Largest Divisible Subset | C++ Python | Note | Medium | |
368 | Plus One Linked List | C++ Python | Note | None | |
369 | Range Addition | C++ Python | Note | None | |
370 | Sum of Two Integers | C++ Python | Note | Easy | |
371 | Super Pow | C++ Python | Note | Medium | |
372 | Find K Pairs with Smallest Sums | C++ Python | Note | Medium | |
373 | Guess Number Higher or Lower | C++ Python | Note | Easy | |
374 | Guess Number Higher or Lower II | C++ Python | Note | Medium | |
375 | Wiggle Subsequence | C++ Python | Note | Medium | |
376 | Combination Sum IV | C++ Python | Note | Medium | |
377 | Kth Smallest Element in a Sorted Matrix | C++ Python | Note | Medium | |
378 | Design Phone Directory | C++ Python | Note | None | |
379 | Insert Delete GetRandom O(1) | C++ Python | Note | Medium | |
380 | Insert Delete GetRandom O(1) - Duplicates allowed | C++ Python | Note | Hard | |
381 | Linked List Random Node | C++ Python | Note | Medium | |
382 | Ransom Note | C++ Python | Note | Easy | |
383 | Shuffle an Array | C++ Python | Note | Medium | |
384 | Mini Parser | C++ Python | Note | Medium | |
385 | Lexicographical Numbers | C++ Python | Note | Medium | |
386 | First Unique Character in a String | C++ Python | Note | Easy | |
387 | Longest Absolute File Path | C++ Python | Note | Medium | |
388 | Find the Difference | C++ Python | Note | Easy | |
389 | Elimination Game | C++ Python | Note | Medium | |
390 | Perfect Rectangle | C++ Python | Note | Hard | |
391 | Is Subsequence | C++ Python | Note | Medium | |
392 | UTF-8 Validation | C++ Python | Note | Medium | |
393 | Decode String | C++ Python | Note | Medium | |
394 | Longest Substring with At Least K Repeating Characters | C++ Python | Note | Medium | |
395 | Rotate Function | C++ Python | Note | Medium | |
396 | Integer Replacement | C++ Python | Note | Medium | |
397 | Random Pick Index | C++ Python | Note | Medium | |
398 | Evaluate Division | C++ Python | Note | Medium | |
399 | Nth Digit | C++ Python | Note | Easy | |
400 | Binary Watch | C++ Python | Note | Easy | |
401 | Remove K Digits | C++ Python | Note | Medium | |
402 | Frog Jump | C++ Python | Note | Hard | |
403 | Sum of Left Leaves | C++ Python | Note | Easy | |
404 | Convert a Number to Hexadecimal | C++ Python | Note | Easy | |
405 | Queue Reconstruction by Height | C++ Python | Note | Medium | |
406 | Trapping Rain Water II | C++ Python | Note | Hard | |
407 | Valid Word Abbreviation | C++ Python | Note | None | |
408 | Longest Palindrome | C++ Python | Note | Easy | |
409 | Split Array Largest Sum | C++ Python | Note | Hard | |
410 | Minimum Unique Word Abbreviation | C++ Python | Note | None | |
411 | Fizz Buzz | C++ Python | Note | Easy | |
412 | Arithmetic Slices | C++ Python | Note | Medium | |
413 | Third Maximum Number | C++ Python | Note | Easy | |
414 | Add Strings | C++ Python | Note | Easy | |
415 | Partition Equal Subset Sum | C++ Python | Note | Medium | |
416 | Pacific Atlantic Water Flow | C++ Python | Note | Medium | |
417 | Sentence Screen Fitting | C++ Python | Note | None | |
418 | Battleships in a Board | C++ Python | Note | Medium | |
419 | Strong Password Checker | C++ Python | Note | Hard | |
420 | Maximum XOR of Two Numbers in an Array | C++ Python | Note | Medium | |
421 | Valid Word Square | C++ Python | Note | None | |
422 | Reconstruct Original Digits from English | C++ Python | Note | Medium | |
423 | Longest Repeating Character Replacement | C++ Python | Note | Medium | |
424 | Word Squares | C++ Python | Note | None | |
425 | All O'one Data Structure | C++ Python | Note | Hard | |
426 | Minimum Genetic Mutation | C++ Python | Note | Medium | |
427 | Number of Segments in a String | C++ Python | Note | Easy | |
428 | Non-overlapping Intervals | C++ Python | Note | Medium | |
429 | Find Right Interval | C++ Python | Note | Medium | |
430 | Path Sum III | C++ Python | Note | Easy | |
431 | Find All Anagrams in a String | C++ Python | Note | Easy | |
432 | Ternary Expression Parser | C++ Python | Note | None | |
433 | K-th Smallest in Lexicographical Order | C++ Python | Note | Hard | |
434 | Arranging Coins | C++ Python | Note | Easy | |
435 | Find All Duplicates in an Array | C++ Python | Note | Medium | |
436 | String Compression | C++ Python | Note | Easy | |
437 | Sequence Reconstruction | C++ Python | Note | None | |
438 | Add Two Numbers II | C++ Python | Note | Medium | |
439 | Arithmetic Slices II - Subsequence | C++ Python | Note | Hard | |
440 | Number of Boomerangs | C++ Python | Note | Easy | |
441 | Find All Numbers Disappeared in an Array | C++ Python | Note | Easy | |
442 | Serialize and Deserialize BST | C++ Python | Note | Medium | |
443 | Delete Node in a BST | C++ Python | Note | Medium | |
444 | Sort Characters By Frequency | C++ Python | Note | Medium | |
445 | Minimum Number of Arrows to Burst Balloons | C++ Python | Note | Medium | |
446 | Minimum Moves to Equal Array Elements | C++ Python | Note | Easy | |
447 | 4Sum II | C++ Python | Note | Medium | |
448 | Assign Cookies | C++ Python | Note | Easy | |
449 | 132 Pattern | C++ Python | Note | Medium | |
450 | Circular Array Loop | C++ Python | Note | Medium | |
451 | Poor Pigs | C++ Python | Note | Easy | |
452 | Repeated Substring Pattern | C++ Python | Note | Easy | |
453 | LFU Cache | C++ Python | Note | Hard | |
454 | Hamming Distance | C++ Python | Note | Easy | |
455 | Minimum Moves to Equal Array Elements II | C++ Python | Note | Medium | |
456 | Island Perimeter | C++ Python | Note | Easy | |
457 | Can I Win | C++ Python | Note | Medium | |
458 | Optimal Account Balancing | C++ Python | Note | None | |
459 | Count The Repetitions | C++ Python | Note | Hard | |
460 | Unique Substrings in Wraparound String | C++ Python | Note | Medium | |
461 | Validate IP Address | C++ Python | Note | Medium | |
462 | Convex Polygon | C++ Python | Note | None | |
463 | Encode String with Shortest Length | C++ Python | Note | None | |
464 | Concatenated Words | C++ Python | Note | Hard | |
465 | Matchsticks to Square | C++ Python | Note | Medium | |
466 | Ones and Zeroes | C++ Python | Note | Medium | |
467 | Heaters | C++ Python | Note | Easy | |
468 | Number Complement | C++ Python | Note | Easy | |
469 | Total Hamming Distance | C++ Python | Note | Medium | |
470 | Largest Palindrome Product | C++ Python | Note | Easy | |
471 | Sliding Window Median | C++ Python | Note | Hard | |
472 | Magical String | C++ Python | Note | Medium | |
473 | License Key Formatting | C++ Python | Note | Easy | |
474 | Smallest Good Base | C++ Python | Note | Hard | |
475 | Find Permutation | C++ Python | Note | None | |
476 | Max Consecutive Ones | C++ Python | Note | Easy | |
477 | Predict the Winner | C++ Python | Note | Medium | |
478 | Max Consecutive Ones II | C++ Python | Note | None | |
479 | Zuma Game | C++ Python | Note | Hard | |
480 | The Maze | C++ Python | Note | None | |
481 | Increasing Subsequences | C++ Python | Note | Medium | |
482 | Construct the Rectangle | C++ Python | Note | Easy | |
483 | Reverse Pairs | C++ Python | Note | Hard | |
484 | Target Sum | C++ Python | Note | Medium | |
485 | Teemo Attacking | C++ Python | Note | Medium | |
486 | Next Greater Element I | C++ Python | Note | Easy | |
487 | Diagonal Traverse | C++ Python | Note | Medium | |
488 | The Maze III | C++ Python | Note | None | |
489 | Keyboard Row | C++ Python | Note | Easy | |
490 | Find Mode in Binary Search Tree | C++ Python | Note | Easy | |
491 | IPO | C++ Python | Note | Hard | |
492 | Next Greater Element II | C++ Python | Note | Medium | |
493 | Base 7 | C++ Python | Note | Easy | |
494 | The Maze II | C++ Python | Note | None | |
495 | Relative Ranks | C++ Python | Note | Easy | |
496 | Perfect Number | C++ Python | Note | Easy | |
497 | Most Frequent Subtree Sum | C++ Python | Note | Medium | |
498 | Find Bottom Left Tree Value | C++ Python | Note | Medium | |
499 | Freedom Trail | C++ Python | Note | Hard | |
500 | Find Largest Value in Each Tree Row | C++ Python | Note | Medium | |
501 | Longest Palindromic Subsequence | C++ Python | Note | Medium | |
502 | Super Washing Machines | C++ Python | Note | Hard | |
503 | Coin Change 2 | C++ Python | Note | Medium | |
504 | Detect Capital | C++ Python | Note | Easy | |
505 | Longest Uncommon Subsequence I | C++ Python | Note | Easy | |
506 | Longest Uncommon Subsequence II | C++ Python | Note | Medium | |
507 | Continuous Subarray Sum | C++ Python | Note | Medium | |
508 | Longest Word in Dictionary through Deleting | C++ Python | Note | Medium | |
509 | Contiguous Array | C++ Python | Note | Medium | |
510 | Beautiful Arrangement | C++ Python | Note | Medium | |
511 | Word Abbreviation | C++ Python | Note | None | |
512 | Minesweeper | C++ Python | Note | Medium | |
513 | Minimum Absolute Difference in BST | C++ Python | Note | Easy | |
514 | Lonely Pixel I | C++ Python | Note | None | |
515 | K-diff Pairs in an Array | C++ Python | Note | Easy | |
516 | Lonely Pixel II | C++ Python | Note | None | |
517 | Design TinyURL | C++ Python | Note | Medium | |
518 | Encode and Decode TinyURL | C++ Python | Note | Medium | |
519 | Construct Binary Tree from String | C++ Python | Note | None | |
520 | Complex Number Multiplication | C++ Python | Note | Medium | |
521 | Convert BST to Greater Tree | C++ Python | Note | Easy | |
522 | Minimum Time Difference | C++ Python | Note | Medium | |
523 | Single Element in a Sorted Array | C++ Python | Note | Medium | |
524 | Reverse String II | C++ Python | Note | Easy | |
525 | 01 Matrix | C++ Python | Note | Medium | |
526 | Diameter of Binary Tree | C++ Python | Note | Easy | |
527 | Output Contest Matches | C++ Python | Note | None | |
528 | Boundary of Binary Tree | C++ Python | Note | None | |
529 | Remove Boxes | C++ Python | Note | Hard | |
530 | Friend Circles | C++ Python | Note | Medium | |
531 | Split Array with Equal Sum | C++ Python | Note | None | |
532 | Binary Tree Longest Consecutive Sequence II | C++ Python | Note | None | |
533 | Student Attendance Record I | C++ Python | Note | Easy | |
534 | Student Attendance Record II | C++ Python | Note | Hard | |
535 | Optimal Division | C++ Python | Note | Medium | |
536 | Brick Wall | C++ Python | Note | Medium | |
537 | Split Concatenated Strings | C++ Python | Note | None | |
538 | Next Greater Element III | C++ Python | Note | Medium | |
539 | Reverse Words in a String III | C++ Python | Note | Easy | |
540 | Subarray Sum Equals K | C++ Python | Note | Medium | |
541 | Array Partition I | C++ Python | Note | Easy | |
542 | Longest Line of Consecutive One in Matrix | C++ Python | Note | None | |
543 | Binary Tree Tilt | C++ Python | Note | Easy | |
544 | Find the Closest Palindrome | C++ Python | Note | Hard | |
545 | Array Nesting | C++ Python | Note | Medium | |
546 | Reshape the Matrix | C++ Python | Note | Easy | |
547 | Permutation in String | C++ Python | Note | Medium | |
548 | Maximum Vacation Days | C++ Python | Note | None | |
549 | Median Employee Salary | C++ Python | Note | None | |
550 | Managers with at Least 5 Direct Reports | C++ Python | Note | None | |
551 | Find Median Given Frequency of Numbers | C++ Python | Note | None | |
552 | Subtree of Another Tree | C++ Python | Note | Easy | |
553 | Squirrel Simulation | C++ Python | Note | None | |
554 | Winning Candidate | C++ Python | Note | None | |
555 | Distribute Candies | C++ Python | Note | Easy | |
556 | Out of Boundary Paths | C++ Python | Note | Medium | |
557 | Employee Bonus | C++ Python | Note | None | |
558 | Get Highest Answer Rate Question | C++ Python | Note | None | |
559 | Find Cumulative Salary of an Employee | C++ Python | Note | None | |
560 | Count Student Number in Departments | C++ Python | Note | None | |
561 | Shortest Unsorted Continuous Subarray | C++ Python | Note | Easy | |
562 | Kill Process | C++ Python | Note | None | |
563 | Delete Operation for Two Strings | C++ Python | Note | Medium | |
564 | Find Customer Referee | C++ Python | Note | None | |
565 | Investments in 2016 | C++ Python | Note | None | |
566 | Customer Placing the Largest Number of Orders | C++ Python | Note | None | |
567 | Erect the Fence | C++ Python | Note | Hard | |
568 | Design In-Memory File System | C++ Python | Note | None | |
569 | Tag Validator | C++ Python | Note | Hard | |
570 | Fraction Addition and Subtraction | C++ Python | Note | Medium | |
571 | Valid Square | C++ Python | Note | Medium | |
572 | Longest Harmonious Subsequence | C++ Python | Note | Easy | |
573 | Big Countries | C++ Python | Note | Easy | |
574 | Classes More Than 5 Students | C++ Python | Note | Easy | |
575 | Friend Requests I: Overall Acceptance Rate | C++ Python | Note | None | |
576 | Range Addition II | C++ Python | Note | Easy | |
577 | Minimum Index Sum of Two Lists | C++ Python | Note | Easy | |
578 | Non-negative Integers without Consecutive Ones | C++ Python | Note | Hard | |
579 | Human Traffic of Stadium | C++ Python | Note | Hard | |
580 | Friend Requests II: Who Has the Most Friends | C++ Python | Note | None | |
581 | Consecutive Available Seats | C++ Python | Note | None | |
582 | Design Compressed String Iterator | C++ Python | Note | None | |
583 | Can Place Flowers | C++ Python | Note | Easy | |
584 | Construct String from Binary Tree | C++ Python | Note | Easy | |
585 | Sales Person | C++ Python | Note | None | |
586 | Tree Node | C++ Python | Note | None | |
587 | Find Duplicate File in System | C++ Python | Note | Medium | |
588 | Triangle Judgement | C++ Python | Note | None | |
589 | Valid Triangle Number | C++ Python | Note | Medium | |
590 | Shortest Distance in a Plane | C++ Python | Note | None | |
591 | Shortest Distance in a Line | C++ Python | Note | None | |
592 | Second Degree Follower | C++ Python | Note | None | |
593 | Average Salary: Departments VS Company | C++ Python | Note | None | |
594 | Add Bold Tag in String | C++ Python | Note | None | |
595 | Merge Two Binary Trees | C++ Python | Note | Easy | |
596 | Students Report By Geography | C++ Python | Note | None | |
597 | Biggest Single Number | C++ Python | Note | None | |
598 | Not Boring Movies | C++ Python | Note | Easy | |
599 | Task Scheduler | C++ Python | Note | Medium | |
600 | Add One Row to Tree | C++ Python | Note | Medium | |
601 | Maximum Distance in Arrays | C++ Python | Note | None | |
602 | Minimum Factorization | C++ Python | Note | None | |
603 | Exchange Seats | C++ Python | Note | Medium | |
604 | Swap Salary | C++ Python | Note | Easy | |
605 | Maximum Product of Three Numbers | C++ Python | Note | Easy | |
606 | K Inverse Pairs Array | C++ Python | Note | Hard | |
607 | Course Schedule III | C++ Python | Note | Hard | |
608 | Design Excel Sum Formula | C++ Python | Note | None | |
609 | Smallest Range | C++ Python | Note | Hard | |
610 | Sum of Square Numbers | C++ Python | Note | Easy | |
611 | Find the Derangement of An Array | C++ Python | Note | None | |
612 | Design Log Storage System | C++ Python | Note | None | |
613 | Exclusive Time of Functions | C++ Python | Note | Medium | |
614 | Average of Levels in Binary Tree | C++ Python | Note | Easy | |
615 | Shopping Offers | C++ Python | Note | Medium | |
616 | Decode Ways II | C++ Python | Note | Hard | |
617 | Solve the Equation | C++ Python | Note | Medium | |
618 | Design Search Autocomplete System | C++ Python | Note | None | |
619 | Maximum Average Subarray I | C++ Python | Note | Easy | |
620 | Maximum Average Subarray II | C++ Python | Note | None | |
621 | Set Mismatch | C++ Python | Note | Easy | |
622 | Maximum Length of Pair Chain | C++ Python | Note | Medium | |
623 | Palindromic Substrings | C++ Python | Note | Medium | |
624 | Replace Words | C++ Python | Note | Medium | |
625 | Dota2 Senate | C++ Python | Note | Medium | |
626 | 2 Keys Keyboard | C++ Python | Note | Medium | |
627 | 4 Keys Keyboard | C++ Python | Note | None | |
628 | Find Duplicate Subtrees | C++ Python | Note | Medium | |
629 | Two Sum IV - Input is a BST | C++ Python | Note | Easy | |
630 | Maximum Binary Tree | C++ Python | Note | Medium | |
631 | Print Binary Tree | C++ Python | Note | Medium | |
632 | Coin Path | C++ Python | Note | None | |
633 | Judge Route Circle | C++ Python | Note | Easy | |
634 | Find K Closest Elements | C++ Python | Note | Medium | |
635 | Split Array into Consecutive Subsequences | C++ Python | Note | Medium | |
636 | Remove 9 | C++ Python | Note | None | |
637 | Image Smoother | C++ Python | Note | Easy | |
638 | Maximum Width of Binary Tree | C++ Python | Note | Medium | |
639 | Equal Tree Partition | C++ Python | Note | None | |
640 | Strange Printer | C++ Python | Note | Hard | |
641 | Non-decreasing Array | C++ Python | Note | Easy | |
642 | Path Sum IV | C++ Python | Note | None | |
643 | Beautiful Arrangement II | C++ Python | Note | Medium | |
644 | Kth Smallest Number in Multiplication Table | C++ Python | Note | Hard | |
645 | Trim a Binary Search Tree | C++ Python | Note | Easy | |
646 | Maximum Swap | C++ Python | Note | Medium | |
647 | Second Minimum Node In a Binary Tree | C++ Python | Note | Easy | |
648 | Bulb Switcher II | C++ Python | Note | Medium | |
649 | Number of Longest Increasing Subsequence | C++ Python | Note | Medium | |
650 | Longest Continuous Increasing Subsequence | C++ Python | Note | Easy | |
651 | Cut Off Trees for Golf Event | C++ Python | Note | Hard | |
652 | Implement Magic Dictionary | C++ Python | Note | Medium | |
653 | Map Sum Pairs | C++ Python | Note | Medium | |
654 | Valid Parenthesis String | C++ Python | Note | Medium | |
655 | 24 Game | C++ Python | Note | Hard | |
656 | Valid Palindrome II | C++ Python | Note | Easy | |
657 | Next Closest Time | C++ Python | Note | None | |
658 | Baseball Game | C++ Python | Note | Easy | |
659 | K Empty Slots | C++ Python | Note | None | |
660 | Redundant Connection | C++ Python | Note | Medium | |
661 | Redundant Connection II | C++ Python | Note | Hard | |
662 | Repeated String Match | C++ Python | Note | Easy | |
663 | Longest Univalue Path | C++ Python | Note | Easy | |
664 | Knight Probability in Chessboard | C++ Python | Note | Medium | |
665 | Maximum Sum of 3 Non-Overlapping Subarrays | C++ Python | Note | Hard | |
666 | Employee Importance | C++ Python | Note | Easy | |
667 | Stickers to Spell Word | C++ Python | Note | Hard | |
668 | Top K Frequent Words | C++ Python | Note | Medium | |
669 | Binary Number with Alternating Bits | C++ Python | Note | Easy | |
670 | Number of Distinct Islands | C++ Python | Note | None | |
671 | Max Area of Island | C++ Python | Note | Easy | |
672 | Count Binary Substrings | C++ Python | Note | Easy | |
673 | Degree of an Array | C++ Python | Note | Easy | |
674 | Partition to K Equal Sum Subsets | C++ Python | Note | Medium | |
675 | Falling Squares | C++ Python | Note | Hard | |
676 | Number of Distinct Islands II | C++ Python | Note | None | |
677 | Minimum ASCII Delete Sum for Two Strings | C++ Python | Note | Medium | |
678 | Subarray Product Less Than K | C++ Python | Note | Medium | |
679 | Best Time to Buy and Sell Stock with Transaction Fee | C++ Python | Note | Medium | |
680 | Range Module | C++ Python | Note | Hard | |
681 | Max Stack | C++ Python | Note | None | |
682 | 1-bit and 2-bit Characters | C++ Python | Note | Easy | |
683 | Maximum Length of Repeated Subarray | C++ Python | Note | Medium | |
684 | Find K-th Smallest Pair Distance | C++ Python | Note | Hard | |
685 | Longest Word in Dictionary | C++ Python | Note | Easy | |
686 | Accounts Merge | C++ Python | Note | Medium | |
687 | Remove Comments | C++ Python | Note | Medium | |
688 | Candy Crush | C++ Python | Note | None | |
689 | Find Pivot Index | C++ Python | Note | Easy | |
690 | Split Linked List in Parts | C++ Python | Note | Medium | |
691 | Number of Atoms | C++ Python | Note | Hard | |
692 | Minimum Window Subsequence | C++ Python | Note | None | |
693 | Self Dividing Numbers | C++ Python | Note | Easy | |
694 | My Calendar I | C++ Python | Note | Medium | |
695 | Count Different Palindromic Subsequences | C++ Python | Note | Hard | |
696 | My Calendar II | C++ Python | Note | Medium | |
697 | My Calendar III | C++ Python | Note | Hard | |
698 | Flood Fill | C++ Python | Note | Easy | |
699 | Sentence Similarity | C++ Python | Note | Easy | |
700 | Asteroid Collision | C++ Python | Note | Medium | |
701 | Parse Lisp Expression | C++ Python | Note | Hard | |
702 | Sentence Similarity II | C++ Python | Note | Medium | |
703 | Monotone Increasing Digits | C++ Python | Note | Medium | |
704 | Daily Temperatures | C++ Python | Note | Medium | |
705 | Delete and Earn | C++ Python | Note | Medium | |
706 | Cherry Pickup | C++ Python | Note | Hard | |
707 | Closest Leaf in a Binary Tree | C++ Python | Note | New | |
708 | Network Delay Time | C++ Python | Note | New | |
709 | Find Smallest Letter Greater Than Target | C++ Python | Note | New | |
710 | Prefix and Suffix Search | C++ Python | Note | New | |